Knife for cutters



H. .S.' WILLIAMS.

KNIQFE Eon cumzss. APPLICATION FILED MAY 5, 1920.

1,377,042. Patented May 3, 1921.

IN l/E IV 70/? A TTORAIEYS EORACE S. WILLIAMS, 0F BROOKLYN NEW YORK.

KNIFE non cU'rTnRs.

lemons.

Specification of Letters Patent.

Application filed May 5, 1920. Serial no. 379,030.

To all whom it may concern Be it known that I, HORACE S. WILLIAMS,

a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county and State of New York, have invented a new and Knife for Cutters, of which the following is a full, clear,'and exact description.

The present invention relates to new and useful improvements in cutting machines, and it pertains more particularly to machines employed for trimming paper. In machines of thischaracter great difliculty has been experienced in attaching and detaching the knives to and from the knife carriers, and it is the primary object of the present invention to so construct the knife carrier as of placing the knife therein and removing the same therefrom.

In machines of this character as ordinar ily constructed, the knife carrier consists of a heavy casing formed with a right-angular rabbet in which the knife is set, and the latter is secured to its carrier by means of bolts, the present invention providin means whereby the positioning of the kni e in its rabbet is facilitated.

Referring to the drawings- Figure 1 is a front elevation of the upper portion of a paper-cutting machine showing a knife carrier constructed in accordance with the present invention;

Fi 2 is a detail sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 isa similar view showing one of the steps in the operation of positioning the knife;

Fig. 4: is a detail front elevationalview of a portion of the knife carrier on an enlarged scale;

7 Fig. 5 is a detail perspective view of one portion of the knife carrier.

Referring more particularly to the drawings, the reference character 10 designates the knife carrier and said knife carrler moves from one side to the other of the machine with a shearing action. s

The reference character 11 designates the knife, and said knife is secured in position by means of bolts 12; As best seen in Fig.2,

the knife carrier 10 is rabbeted out as at 13, to provide a rest for the knife and the bolts 12 are provided with ascrew-threaded extension 14, which passes through openings Improved to greatly facilitate the-operation tension 21. in place on the blade, the latter isprovided provided in the knife carrier into threaded engagement with openings 15 in the knife.

In carrying out the present invention, the r knife carrier 10 is provided with curved passages 16, there being two of these'qpassages, one arranged adjacent each end of the machine. These passages. 16 lead from the lower end of the rabbet 13 into'one of the bolt openings of the carrier and serve as'a guiding means for a tool to be hereinafter described.

v The reference character. 20 designates a tool which may be of any preferred form, but is shown in the present instance as a wrench used about other parts of themachine. This tool 20 is provided on one of its ends with screw threads 21 of the same character as the threads in the'openings 15 Patented May'3,1921.

in the knife 11, andsaid threaded end of the tool 20 is adapted to-be positioned 'within one of these openings as shown in Fig. 3.

The reference character 25/designates a filling block and one of these blocks 25 is adapted to be received within each of the passages 16 to close the same and prevent the lodging of paper or other material therein during the use or operation of the device. Each of these blocks 25 is provided with a circular head portion 26 adapted to I lie in a recess 27 formed around each of the bolt openings in the knife carrier which'isrier 10, two of the tools or wrenches 20 are employed, and each of these is engaged with one of the screw-threaded openings 15 in the knife 11, by means of itsthreadedex- With these members secured with manipulating handles by means of which it may be lifted and readily moved from place to place; The operator grasping these handles positions them beneath the curved passages 16. After this has been accomplished, the knife is 'liftedwith the .tools or wrenches 20 passing through their respective passages 16 until each handle engages its respective centralbolt opening in the carrier. This positioning of the parts is shown in Fig. '3. With the blade in this position, the several'bolts 12 are set to secure the blade, after which the'tools "or handles are removed, the filling blocks placed in their respective passages, and the bolts 12 positioned inthe openings left vacant by the removal of the tools or Wrenches 20. s

From the foregoing, it Will be seen that the present invention provides means by which the operation of attaching heavy knives to their carriers and detaching the same therefrom,- is greatly i acilitated, and,

- at the same time, is carried out in such a manner as to greatly lessen the possibility of accidental injury either to the machine or to the operator.

W hat is claimed is:

l. A device of the character described comprisin a cutter bar provided with a cutter seat and a plurality of openings adapted to receive a cutter-securing means, a cutting element adapted to be engaged by the seat of the cutter bar, and means for elevating said cutting element, said elevating means being detachably, secured to the cuttlng element in the openings normally engaged by the securing means, said elevating means being adapted to pass through slots in the cutter bar to permit of the movement of the cutting element to the seat of the cutter bar,

- said elevating means being subsequently removed, and means adapted to be received Within the slots after the elevating means has been removed in order to close the slots means for securing said cutter in place upon the cutter bar, detachable elevating means for said cutter, sald cutter bar being provided With curved slots leading from one edge thereof to certain of the cutter-securing bolt-receiving openings to permit of the free passage 01"" the-cutter elevating means during the positioning of the cutter relative to the cutter bar.

HORACE s. WILLIAMS. 

